I know Datran is having some ...umm.. legal issues in regards to their work with the Gratis Internet people (FreeIpods):
http://www.cnn.com/2006/TECH/interne....ap/index.html
Although they settled out of court.
I work with a company who does my email marketing however I am not sure if they will manage someone elses list unless you are buying email from them.
I can check for you if you are interested and put you in touch with them. Hit me up on ICQ if you want me to check into it.